Taper attachment for turret-lathes.



PATENTED APR. 19, 1904.

G. G. RIGHARDSON. I TAPER ATTACHMENT FOR TURREI' LATHES.

APPLIOATION FILED OUT. 31. 1902.

3 SHEETS-SHEET 1.

N0 MODEL.

INVENTOR Chm/Mu 9. @W BY W WHNESSES ATTORNEY PATENTED APR. 19, 1904.

- APPLIGATION FILED OUT. 31, 1902.

3 SKEETB-BHEET 3.

to MODEL.

11. .23.. 1.33 l i z 4 V V l 1 (I! W z y n M F? .m M v W Ww l witnesses -47.

UNITED STATES Patented April 19, 1904.

PATENT OFFICE.

TAP ER ATTACHMENT FOR TURRET-LATHES- SPECIFICATION forming part of Letters Patent No. 757,681, dated April 19, 1904.

Application filed October 31, 1902.

To all whmn it may concern.-

' Be it known that I, CHARLES Gr. RIcHAEnsoN, of Springfield,Windsor county, Vermont,

, have invented a new and useful Improvement in Taper Attachments for Turret-Lathes, of which the following is a specification.

The object of my invention is to enable a tool supported upon the turret or carrier of a turret-lathe to cut a taper upon the work held in the chuck.

The invention consists in the combination, with the movable tool-carrier, of means for simultaneously moving the tool supported by the carrier in a direction substantially transverse to the axis of rotation of the work; also, in the construction and arrangement of the adjustable guide-bar controlling said transverse movement of said tool; also, in an adjustable taper guide-bar for said tool mounted on and revoluble with the carrier; also, in the various combinations set forth in the claims.

In the accompanying drawings, Figure 1 is a plan view showing a portion of the toolcarrier and also the stationary arm which is to be connected to the head-stock or any other stationary part of the lathe. Fig. 2 is a section on the line 2 2 of Fig. 1 Viewed in the direction of the arrow. Fig, 3 is an enlarged view of a portion of a turret provided with a tool-carrier and my improved taper attach-' ment looking in the direction of the arrow in Fig. 1. Fig. i is a partial section on line 3 3 in Fig. 8.

For convenience I here show the device attached to one face of a polygonal tool or work carrier of the type which encircles the bed of the lathe and which is fully described in United States Letters Patent *No. 481,717, granted to me August 30, 1892. A portion of this work-carrier is shown at A in section, Figs. 2 and 3. It is to be understood, however, that I may use any other suitable form of tool-carrier.

Secured upon the face of the turret by means of a bolt B is the supporting-block G. The outer face of this block has formed in it an inwardly-dovetailed recess D. In the recess D is received a dovetail bar E. The longitudinal axis of the dovetail recess D is to be set exactly parallel to the axis of rotation Serial No. 129,544. (No model.)

of the work. At the end of the bar E nearest the head-stock there is a projection F, containing an opening to receive the end of the stationary arm G, which arm is tobe secured to the lathe head-stock or other suitable fixed support. When the carrier is rotated so as to bring the tool A controlled by the present device into operative position, then the end of arm Gr is introduced into the opening in projection F. It will be seen, therefore, that my present device is in fact wholly mounted on the carrier and that the arm Gr, secured to the head-stock, is practically an abutment. When the carrier is mov ing toward the head-stock, it is sufficieutfor the arm G simply to enter the opening F; but when the carrier is moving in the opposite direction then the set-screw His used to secure the end of arm G in said opening. Outside of the bar E is another dovetail bar, I, which at one end is connected "to the bar E by means of the pivot-screw J. Each of the bars E and I has a T-shaped end. The T-shaped end of the bar E is shown at K in Fig. 2, and the T- shaped end of the bar I is shown at L in said figure. It will be seen that the bar I lies directly outside of the bar E and is pivoted to said bar, as alreadydescribed, by means of the screw J. The T-shaped end of the bar E is provided with three threaded openings M N 0, Fig. 1. The T-shaped end of the bar I is provided with a single elongated slot P, which extends over said openings in the bar E. I here show' only three holes M N 0; but,

as will be readily understood, any number of said holes may be introduced in the T-shaped end of the bar E. Passing through the slot P is an adjusting-screw'Q. From what has now been explained it will be seen that the bar I may be moved by hand, so as to be placed at an angle to the bar E upon its pivot J, and may be clamped in adjusted position by the set-screw Q. The bar I when thus set at any desired angle becomes substantially a guidecam, which when the carrier moves toward or from the head-stock of the lathe actuates a sliding rod, hereinafter described, to move the tool A in a direction transverse to the axis of rotation of the work, and so to or from the work, thus producing the desired taper.

Resting upon the bar I and inclosing it is a slide-block R, which is free to move on the bar I in a longitudinal direction, so that the inclined edge of said bar when set at an angle, as described, causes said slide-block to move in a direction at right angles to the axis of rotation of the work and to an extent depending upon the angle of inclination at which the bar I may be adjusted on its pivot J, as already described. The slide-block R carries the square sliding rod S, which passes through a recess in a projection T, secured to the supportingblock C by means of the screws U. v Into rod S enters the end V of the double screw-rod Y. The opposite end W of said rod is connected to the tool or tool-block A This tool carrier or block A is slidingly mounted in the tool-block holder A also secured to the face of the turret next to the block C, as shown in Fig. 3. The rod is turned by the milled head Z.

The operation of the device will now readily be followed. In Fig. 1 the bar I is shown clamped in position by means of the set-screw Q passing into the central hole N in the T- shaped end of bar E, in which case the device is not set to produce any taper. If it be desired now to produce a given taper, the setscrew Q is loosened and the bar I is turnedv upon its pivot J to any desired angle and clamped in position by the set-screw Q. As the carrier A then either approaches or recedes from the head-stock the movable block R, following the inclination of the bar 1, will in the manner already described cause the tool A to advance toward or recede from the work A* to an extent always proportional to the angle of said inclination, and thus to produce upon the work a taper corresponding to said inclination. If'it is desired to set the bar I over to its extreme position in either direction, then the set-screw Q may be introduced into either end aperture M or O and there be secured. The object of the guide-opening for the bar S in the projection T is to prevent any tendency of said bar to swerve in one way or the other-in other words, to keep its movement in a right line It will be seen that the adjustable taper-bar is mounted on the turret itself and rotates with it, so that the mere shifting of the bar I is all that is required to effect the cutting of different tapers. Moreover, no different guides or templets are required for changing the taper and no mechanism mounted on the lathe-bed is required, and my taper-forming mechanism is not required to be disturbed or put out of adjustment, as would be the case with such mechanism where mounted on a cross-slide instead of on the turret.

I claim 1. In combination with the tool-carrier of a turret-lathe movable in the direction of the axis of rotation of the work and means for movinga tool supported on said carrier in a direction transverse to said axis, a cam-guide mounted on the turretadjacent to said toolcarrier; the said guide being bodily movable and adjustable to vary its inclination and controlling proportionately to said inclination, the extent of movement of said means for moving said tool, substantially as described.

2. In combination with the tool-carrier of a turret-lathe movable, in the direction of the axis of rotation of the work, and a tool movable on said carrier in a direction transverse to said axis, an independently-supported bar mounted on the turret and extending in proximity to the path of said carrier and pivoted at one extremity, means for securing said bar in definite position on its pivot and a sliding piece traversing said bar and connected to said tool, substantially as described.

3. The combination with the tool-carrier of a turret-lathe, of the supporting-block C mounted on the turret and having a recess, bar E in said recess and secured at one end to an independent support, bar I pivoted at one end to bar E, means for holding said bar in angular adjustment on its pivot, a sliding block R on bar I and a tool-actuating rod S connected to said sliding block, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES G. RICHARDSON.

W'itnesses:

WM. H. SIEGMAN, I. A. VAN W our. 

